209020430490 has 32 divisors (see below), whose sum is σ = 501664924800. Its totient is φ = 55737015744.

The previous prime is 209020430459. The next prime is 209020430533. The reversal of 209020430490 is 94034020902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1053736 + ... + 1236284.

It is an arithmetic number, because the mean of its divisors is an integer number (15677028900).

Almost surely, 2^209020430490 is an apocalyptic number.

209020430490 is an abundant number, since it is smaller than the sum of its proper divisors (292644494310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209020430490 is a wasteful number, since it uses less digits than its factorization.

209020430490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220726.

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 209020430490 in words is "two hundred nine billion, twenty million, four hundred thirty thousand, four hundred ninety".